X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx1.grc.nasa.gov ([128.156.11.68] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1001491 for flyrotary@lancaironline.net; Tue, 14 Jun 2005 09:14:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=128.156.11.68; envelope-from=Joseph.M.Berki@grc.nasa.gov Received: from lombok-fi.grc.nasa.gov (seraph1.grc.nasa.gov [128.156.10.10]) by mx1.grc.nasa.gov (Postfix) with ESMTP id D278BC2AE for ; Tue, 14 Jun 2005 09:13:58 -0400 (EDT) Received: from apataki.grc.nasa.gov (apataki.grc.nasa.gov [139.88.112.35]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id j5EDDwK9022924 for ; Tue, 14 Jun 2005 09:13:58 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by apataki.grc.nasa.gov (NASA GRC TCPD 8.13.1/8.13.1) with ESMTP id j5EDDv6E027064 for ; Tue, 14 Jun 2005 09:13:58 -0400 (EDT) Received: from apataki.grc.nasa.gov ([127.0.0.1])by localhost (apataki.grc.n asa.gov [127.0.0.1]) (amavisd-new, port 10024)with ESMTP id 21722-28 for ;Tue, 14 Jun 2005 09:13:57 -0400 (EDT) Received: from GR7700013583.lerc.nasa.gov (gr7700013583.grc.nasa.gov [139.88 .139.62])by apataki.grc.nasa.gov (NASA GRC TCPD 8.13.1/8.13.1) with ESMTP i d j5EDDrmX026992for ; Tue, 14 Jun 2005 09:13:5 3 -0400 (EDT) X-Info: ODIN / NASA Glenn Research Center Message-Id: <5.1.1.5.2.20050614090201.0109dfc8@popserve.lerc.nasa.gov> X-Sender: scberki@popserve.lerc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Tue, 14 Jun 2005 09:13:49 -0400 To: "Rotary motors in aircraft" From: Joseph M Berki Subject: fuel pump mounting Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed X-imss-version: 2.25 X-imss-result: Passed X-imss-approveListMatch: *@*.NASA.GOV If you use the electric fuel pumps like Tracy is using what does the inlet side look like (plumbing)? Does the pump have any suction on the inlet? Should it be purely gravity fed? Can the inlet be fed from a tube that goes into a tank close to the bottom 1.5" but is bent down in a 90 degree bend? The sump is lower than the tanks and the pumps would be at the level of the bottom of the sump. My concern is how much of a "hump" in the plumbing will the pump tolerate? Thanks for any help. Joe Berki Limo EZ